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MG MG Y Type - YB Brakes

In Neil's piece on YB brakes here:

http://www.mgccyregister.co.uk/technical-information/brakes/yayt-yb-brakes-in-old-age/

he states that the YB has beehive/pyramid springs to hold the shoes to the backplate both on the front and the back. On dismantling mine I find to my surprise that there are none on the front though they do exist on the rear. Moreover there are no slots/holes in the backplate for them suggesting that they should not be there. The photo accompanying Neil's piece also shows none though he states in the text that they should be there. Can anybody shed some light on this mystery.

Regards
Ian Thomson
ian thomson

Ian
just looking at the pic. it looks as though the return springs are fitted behind the shoes which would hold the shoes back against the backing plate by them selves meaning no other pins/springs would be needed--
I doubt they had them
William Revit

Mine only had them on the rear.Good thing too - they're not easy to fit!
P Willows

William, I don't see how you could mount the springs behind the shoes as there are no holes in the backplates for them to secure to. I suppose that a type of beehive spring could be used behind as an anti rattle but they would tend to push the shoes forward, which is not good, as well as requiring a spring without the securing tag. Besides you would be able to see such a spring protruding though the spring hole as it would have to be secured to something. I would attach a photo but they are coming out too large for the system.

Still puzzled
Ian
ian thomson

Ian,
I think the point is that the return springs (not beehive springs, which are not fitted) fit to the rear side of the shoes and thereby have the effect of slightly pulling them towards the back plate.
Pete
P Willows

yep---That's how i see it Pete
Cheers
willy
William Revit

Sorry William, I misunderstood you. I should read things more carefully. Most, probably all, cars, not just old ones, which I have worked on have some sort of securing arrangement in the centre of the shoes though, if my memory serves me correctly. On top of that it is normal for the pull off springs to be mounted behind the shoes. Moreover, looking carefully at the shoes on my YB they are not actually pulled back to the backplates but sort of hover between backplate and drum held in that position by the slot on one end of the slave cylinder and the snail cam on the other. It seems to work though.
Regards Ian
ian thomson

This thread was discussed between 21/10/2018 and 24/10/2018

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